1g Resolution over 15kg Range Sub-100nVpp Noise Front-End Reference Design
TIDA-00765
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- High-Resolution Low-Noise Front-End Weight Vibration Measurement Design Guide (Rev. A)
(PDF 2475 KB)
14 Jun 2016
Description
TIDA-00765 is a less than 100nVpp analog front end for resistive strain gauge bridge load cell-based weight and vibration measurement. It is ideally suited for appliances, which require high-resolution due to large dynamic range or have considerable weight offset. In the face of significant levels of switching supply noise and rapid temperature changes, drift and interference are common issues in harsh environments. The design’s high integration, AC excitation, and robust filtering suppress drift and interference to ensure consistent performance in tough environments.
Features
- Captures outputs of both multiple and single resistive strain gauge-based load cell bridges simultaneously
- Consistent <100nVpp low-noise performance
- <5-μV total error from 0ᵒC to 85ᵒC
- AC excitation robustly eliminates drift introduced by parasitic thermocouples and other causes
- Highly robust to >500mVpp 100-kHz switching-supply noise
- Captures vibrations up to 500 Hz with sample rate ≤2 kSps
See the Important Notice and Disclaimer covering reference designs and other TI resources.
